69
import cPickle as pickle
63
import cPickle as pickle
72
64
import multiprocessing
81
68
import dbus.service
82
from gi.repository import GLib
83
71
from dbus.mainloop.glib import DBusGMainLoop
86
74
import xml.dom.minidom
89
# Try to find the value of SO_BINDTODEVICE:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
93
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
79
except AttributeError:
96
# This is where SO_BINDTODEVICE was up to and including Python
98
81
from IN import SO_BINDTODEVICE
99
82
except ImportError:
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
112
SO_BINDTODEVICE = None
114
if sys.version_info.major == 2:
118
stored_state_file = "clients.pickle"
120
logger = logging.getLogger()
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
147
return types.FunctionType(func.__code__,
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
164
logger.addHandler(syslogger)
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
172
logger.addHandler(console)
173
logger.setLevel(level)
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
195
if e.errno != errno.ENOENT:
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
208
def __exit__(self, exc_type, exc_value, traceback):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
220
for filename in files:
221
os.remove(os.path.join(root, filename))
223
os.rmdir(os.path.join(root, dirname))
225
os.rmdir(self.tempdir)
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
245
proc = subprocess.Popen([self.gpg, '--symmetric',
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
263
proc = subprocess.Popen([self.gpg, '--decrypt',
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
273
return decrypted_plaintext
276
# Pretend that we have an Avahi module
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
83
SO_BINDTODEVICE = None
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
303
104
class AvahiError(Exception):
304
105
def __init__(self, value, *args, **kwargs):
305
106
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
310
111
class AvahiServiceError(AvahiError):
314
114
class AvahiGroupError(AvahiError):
318
118
class AvahiService(object):
319
119
"""An Avahi (Zeroconf) service.
322
122
interface: integer; avahi.IF_UNSPEC or an interface index.
323
123
Used to optionally bind to the specified interface.
324
124
name: string; Example: 'Mandos'
325
125
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
327
127
port: integer; what port to announce
328
128
TXT: list of strings; TXT record for the service
329
129
domain: string; Domain to publish on, default to .local if empty.
488
262
follow_name_owner_changes=True),
489
263
avahi.DBUS_INTERFACE_SERVER)
490
264
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
265
self.server_state_changed)
492
266
self.server_state_changed(self.server.GetState())
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
510
_library = ctypes.cdll.LoadLibrary(
511
ctypes.util.find_library("gnutls"))
512
_need_version = b"3.3.0"
515
# Need to use class name "GnuTLS" here, since this method is
516
# called before the assignment to the "gnutls" global variable
518
if GnuTLS.check_version(self._need_version) is None:
519
raise GnuTLS.Error("Needs GnuTLS {} or later"
520
.format(self._need_version))
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
533
E_NO_CERTIFICATE_FOUND = -49
534
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
537
class session_int(ctypes.Structure):
539
session_t = ctypes.POINTER(session_int)
541
class certificate_credentials_st(ctypes.Structure):
543
certificate_credentials_t = ctypes.POINTER(
544
certificate_credentials_st)
545
certificate_type_t = ctypes.c_int
547
class datum_t(ctypes.Structure):
548
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
549
('size', ctypes.c_uint)]
551
class openpgp_crt_int(ctypes.Structure):
553
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
554
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
555
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
556
credentials_type_t = ctypes.c_int
557
transport_ptr_t = ctypes.c_void_p
558
close_request_t = ctypes.c_int
561
class Error(Exception):
562
# We need to use the class name "GnuTLS" here, since this
563
# exception might be raised from within GnuTLS.__init__,
564
# which is called before the assignment to the "gnutls"
565
# global variable has happened.
566
def __init__(self, message=None, code=None, args=()):
567
# Default usage is by a message string, but if a return
568
# code is passed, convert it to a string with
571
if message is None and code is not None:
572
message = GnuTLS.strerror(code)
573
return super(GnuTLS.Error, self).__init__(
576
class CertificateSecurityError(Error):
580
class Credentials(object):
582
self._c_object = gnutls.certificate_credentials_t()
583
gnutls.certificate_allocate_credentials(
584
ctypes.byref(self._c_object))
585
self.type = gnutls.CRD_CERTIFICATE
588
gnutls.certificate_free_credentials(self._c_object)
590
class ClientSession(object):
591
def __init__(self, socket, credentials=None):
592
self._c_object = gnutls.session_t()
593
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
594
gnutls.set_default_priority(self._c_object)
595
gnutls.transport_set_ptr(self._c_object, socket.fileno())
596
gnutls.handshake_set_private_extensions(self._c_object,
599
if credentials is None:
600
credentials = gnutls.Credentials()
601
gnutls.credentials_set(self._c_object, credentials.type,
602
ctypes.cast(credentials._c_object,
604
self.credentials = credentials
607
gnutls.deinit(self._c_object)
610
return gnutls.handshake(self._c_object)
612
def send(self, data):
616
data_len -= gnutls.record_send(self._c_object,
621
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
# Error handling functions
624
def _error_code(result):
625
"""A function to raise exceptions on errors, suitable
626
for the 'restype' attribute on ctypes functions"""
629
if result == gnutls.E_NO_CERTIFICATE_FOUND:
630
raise gnutls.CertificateSecurityError(code=result)
631
raise gnutls.Error(code=result)
633
def _retry_on_error(result, func, arguments):
634
"""A function to retry on some errors, suitable
635
for the 'errcheck' attribute on ctypes functions"""
637
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
638
return _error_code(result)
639
result = func(*arguments)
642
# Unless otherwise indicated, the function declarations below are
643
# all from the gnutls/gnutls.h C header file.
646
priority_set_direct = _library.gnutls_priority_set_direct
647
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
648
ctypes.POINTER(ctypes.c_char_p)]
649
priority_set_direct.restype = _error_code
651
init = _library.gnutls_init
652
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
653
init.restype = _error_code
655
set_default_priority = _library.gnutls_set_default_priority
656
set_default_priority.argtypes = [session_t]
657
set_default_priority.restype = _error_code
659
record_send = _library.gnutls_record_send
660
record_send.argtypes = [session_t, ctypes.c_void_p,
662
record_send.restype = ctypes.c_ssize_t
663
record_send.errcheck = _retry_on_error
665
certificate_allocate_credentials = (
666
_library.gnutls_certificate_allocate_credentials)
667
certificate_allocate_credentials.argtypes = [
668
ctypes.POINTER(certificate_credentials_t)]
669
certificate_allocate_credentials.restype = _error_code
671
certificate_free_credentials = (
672
_library.gnutls_certificate_free_credentials)
673
certificate_free_credentials.argtypes = [
674
certificate_credentials_t]
675
certificate_free_credentials.restype = None
677
handshake_set_private_extensions = (
678
_library.gnutls_handshake_set_private_extensions)
679
handshake_set_private_extensions.argtypes = [session_t,
681
handshake_set_private_extensions.restype = None
683
credentials_set = _library.gnutls_credentials_set
684
credentials_set.argtypes = [session_t, credentials_type_t,
686
credentials_set.restype = _error_code
688
strerror = _library.gnutls_strerror
689
strerror.argtypes = [ctypes.c_int]
690
strerror.restype = ctypes.c_char_p
692
certificate_type_get = _library.gnutls_certificate_type_get
693
certificate_type_get.argtypes = [session_t]
694
certificate_type_get.restype = _error_code
696
certificate_get_peers = _library.gnutls_certificate_get_peers
697
certificate_get_peers.argtypes = [session_t,
698
ctypes.POINTER(ctypes.c_uint)]
699
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
global_set_log_level = _library.gnutls_global_set_log_level
702
global_set_log_level.argtypes = [ctypes.c_int]
703
global_set_log_level.restype = None
705
global_set_log_function = _library.gnutls_global_set_log_function
706
global_set_log_function.argtypes = [log_func]
707
global_set_log_function.restype = None
709
deinit = _library.gnutls_deinit
710
deinit.argtypes = [session_t]
711
deinit.restype = None
713
handshake = _library.gnutls_handshake
714
handshake.argtypes = [session_t]
715
handshake.restype = _error_code
716
handshake.errcheck = _retry_on_error
718
transport_set_ptr = _library.gnutls_transport_set_ptr
719
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
720
transport_set_ptr.restype = None
722
bye = _library.gnutls_bye
723
bye.argtypes = [session_t, close_request_t]
724
bye.restype = _error_code
725
bye.errcheck = _retry_on_error
727
check_version = _library.gnutls_check_version
728
check_version.argtypes = [ctypes.c_char_p]
729
check_version.restype = ctypes.c_char_p
731
# All the function declarations below are from gnutls/openpgp.h
733
openpgp_crt_init = _library.gnutls_openpgp_crt_init
734
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
735
openpgp_crt_init.restype = _error_code
737
openpgp_crt_import = _library.gnutls_openpgp_crt_import
738
openpgp_crt_import.argtypes = [openpgp_crt_t,
739
ctypes.POINTER(datum_t),
741
openpgp_crt_import.restype = _error_code
743
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
744
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
745
ctypes.POINTER(ctypes.c_uint)]
746
openpgp_crt_verify_self.restype = _error_code
748
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
749
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
750
openpgp_crt_deinit.restype = None
752
openpgp_crt_get_fingerprint = (
753
_library.gnutls_openpgp_crt_get_fingerprint)
754
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
openpgp_crt_get_fingerprint.restype = _error_code
760
# Remove non-public functions
761
del _error_code, _retry_on_error
762
# Create the global "gnutls" object, simulating a module
766
def call_pipe(connection, # : multiprocessing.Connection
767
func, *args, **kwargs):
768
"""This function is meant to be called by multiprocessing.Process
770
This function runs func(*args, **kwargs), and writes the resulting
771
return value on the provided multiprocessing.Connection.
773
connection.send(func(*args, **kwargs))
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
777
275
class Client(object):
778
276
"""A representation of a client host served by this server.
781
approved: bool(); 'None' if not yet approved/disapproved
279
_approved: bool(); 'None' if not yet approved/disapproved
782
280
approval_delay: datetime.timedelta(); Time to wait for approval
783
281
approval_duration: datetime.timedelta(); Duration of one approval
784
282
checker: subprocess.Popen(); a running checker process used
785
283
to see if the client lives.
786
284
'None' if no process is running.
787
checker_callback_tag: a GLib event source tag, or None
285
checker_callback_tag: a gobject event source tag, or None
788
286
checker_command: string; External command which is run to check
789
287
if client lives. %() expansions are done at
790
288
runtime with vars(self) as dict, so that for
791
289
instance %(name)s can be used in the command.
792
checker_initiator_tag: a GLib event source tag, or None
290
checker_initiator_tag: a gobject event source tag, or None
793
291
created: datetime.datetime(); (UTC) object creation
794
client_structure: Object describing what attributes a client has
795
and is used for storing the client at exit
796
292
current_checker_command: string; current running checker_command
797
disable_initiator_tag: a GLib event source tag, or None
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
799
296
fingerprint: string (40 or 32 hexadecimal digits); used to
800
297
uniquely identify the client
802
299
interval: datetime.timedelta(); How often to start a new checker
803
300
last_approval_request: datetime.datetime(); (UTC) or None
804
301
last_checked_ok: datetime.datetime(); (UTC) or None
805
last_checker_status: integer between 0 and 255 reflecting exit
806
status of last checker. -1 reflects crashed
807
checker, -2 means no checker completed yet.
808
last_checker_signal: The signal which killed the last checker, if
809
last_checker_status is -1
810
last_enabled: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
811
303
name: string; from the config file, used in log messages and
812
304
D-Bus identifiers
813
305
secret: bytestring; sent verbatim (over TLS) to client
814
306
timeout: datetime.timedelta(); How long from last_checked_ok
815
307
until this client is disabled
816
extended_timeout: extra long timeout when secret has been sent
308
extended_timeout: extra long timeout when password has been sent
817
309
runtime_expansions: Allowed attributes for runtime expansion.
818
310
expires: datetime.datetime(); time (UTC) when a client will be
819
311
disabled, or None
820
server_settings: The server_settings dict from main()
823
314
runtime_expansions = ("approval_delay", "approval_duration",
824
"created", "enabled", "expires",
825
"fingerprint", "host", "interval",
826
"last_approval_request", "last_checked_ok",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
827
317
"last_enabled", "name", "timeout")
830
"extended_timeout": "PT15M",
832
"checker": "fping -q -- %%(host)s",
834
"approval_delay": "PT0S",
835
"approval_duration": "PT1S",
836
"approved_by_default": "True",
841
def config_parser(config):
842
"""Construct a new dict of client settings of this form:
843
{ client_name: {setting_name: value, ...}, ...}
844
with exceptions for any special settings as defined above.
845
NOTE: Must be a pure function. Must return the same result
846
value given the same arguments.
849
for client_name in config.sections():
850
section = dict(config.items(client_name))
851
client = settings[client_name] = {}
853
client["host"] = section["host"]
854
# Reformat values from string types to Python types
855
client["approved_by_default"] = config.getboolean(
856
client_name, "approved_by_default")
857
client["enabled"] = config.getboolean(client_name,
860
# Uppercase and remove spaces from fingerprint for later
861
# comparison purposes with return value from the
862
# fingerprint() function
863
client["fingerprint"] = (section["fingerprint"].upper()
865
if "secret" in section:
866
client["secret"] = codecs.decode(section["secret"]
869
elif "secfile" in section:
870
with open(os.path.expanduser(os.path.expandvars
871
(section["secfile"])),
873
client["secret"] = secfile.read()
875
raise TypeError("No secret or secfile for section {}"
877
client["timeout"] = string_to_delta(section["timeout"])
878
client["extended_timeout"] = string_to_delta(
879
section["extended_timeout"])
880
client["interval"] = string_to_delta(section["interval"])
881
client["approval_delay"] = string_to_delta(
882
section["approval_delay"])
883
client["approval_duration"] = string_to_delta(
884
section["approval_duration"])
885
client["checker_command"] = section["checker"]
886
client["last_approval_request"] = None
887
client["last_checked_ok"] = None
888
client["last_checker_status"] = -2
892
def __init__(self, settings, name=None, server_settings=None):
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
894
if server_settings is None:
896
self.server_settings = server_settings
897
# adding all client settings
898
for setting, value in settings.items():
899
setattr(self, setting, value)
902
if not hasattr(self, "last_enabled"):
903
self.last_enabled = datetime.datetime.utcnow()
904
if not hasattr(self, "expires"):
905
self.expires = (datetime.datetime.utcnow()
908
self.last_enabled = None
911
341
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
345
self.fingerprint = (config["fingerprint"].upper()
912
347
logger.debug(" Fingerprint: %s", self.fingerprint)
913
self.created = settings.get("created",
914
datetime.datetime.utcnow())
916
# attributes specific for this server instance
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
354
self.secret = secfile.read()
356
raise TypeError("No secret or secfile for client %s"
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
917
369
self.checker = None
918
370
self.checker_initiator_tag = None
919
371
self.disable_initiator_tag = None
920
373
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
921
375
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
923
380
self.approvals_pending = 0
924
self.changedstate = multiprocessing_manager.Condition(
925
multiprocessing_manager.Lock())
926
self.client_structure = [attr
927
for attr in self.__dict__.keys()
928
if not attr.startswith("_")]
929
self.client_structure.append("client_structure")
931
for name, t in inspect.getmembers(
932
type(self), lambda obj: isinstance(obj, property)):
933
if not name.startswith("_"):
934
self.client_structure.append(name)
936
# Send notice to process children that client state has changed
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
937
389
def send_changedstate(self):
938
with self.changedstate:
939
self.changedstate.notify_all()
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
941
394
def enable(self):
942
395
"""Start this client's checker and timeout hooks"""
943
396
if getattr(self, "enabled", False):
944
397
# Already enabled
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
405
# Schedule a disable() when 'timeout' has passed
946
406
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
947
410
self.enabled = True
948
411
self.last_enabled = datetime.datetime.utcnow()
950
self.send_changedstate()
412
# Also start a new checker *right now*.
952
415
def disable(self, quiet=True):
953
416
"""Disable this client."""
954
417
if not getattr(self, "enabled", False):
420
self.send_changedstate()
957
422
logger.info("Disabling client %s", self.name)
958
if getattr(self, "disable_initiator_tag", None) is not None:
959
GLib.source_remove(self.disable_initiator_tag)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
960
425
self.disable_initiator_tag = None
961
426
self.expires = None
962
if getattr(self, "checker_initiator_tag", None) is not None:
963
GLib.source_remove(self.checker_initiator_tag)
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
964
429
self.checker_initiator_tag = None
965
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
966
433
self.enabled = False
968
self.send_changedstate()
969
# Do not run this again if called by a GLib.timeout_add
434
# Do not run this again if called by a gobject.timeout_add
972
437
def __del__(self):
438
self.disable_hook = None
975
def init_checker(self):
976
# Schedule a new checker to be started an 'interval' from now,
977
# and every interval from then on.
978
if self.checker_initiator_tag is not None:
979
GLib.source_remove(self.checker_initiator_tag)
980
self.checker_initiator_tag = GLib.timeout_add(
981
int(self.interval.total_seconds() * 1000),
983
# Schedule a disable() when 'timeout' has passed
984
if self.disable_initiator_tag is not None:
985
GLib.source_remove(self.disable_initiator_tag)
986
self.disable_initiator_tag = GLib.timeout_add(
987
int(self.timeout.total_seconds() * 1000), self.disable)
988
# Also start a new checker *right now*.
991
def checker_callback(self, source, condition, connection,
441
def checker_callback(self, pid, condition, command):
993
442
"""The checker has completed, so take appropriate actions."""
994
443
self.checker_callback_tag = None
995
444
self.checker = None
996
# Read return code from connection (see call_pipe)
997
returncode = connection.recv()
1001
self.last_checker_status = returncode
1002
self.last_checker_signal = None
1003
if self.last_checker_status == 0:
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
1004
448
logger.info("Checker for %(name)s succeeded",
1006
450
self.checked_ok()
1008
logger.info("Checker for %(name)s failed", vars(self))
452
logger.info("Checker for %(name)s failed",
1010
self.last_checker_status = -1
1011
self.last_checker_signal = -returncode
1012
455
logger.warning("Checker for %(name)s crashed?",
1016
def checked_ok(self):
1017
"""Assert that the client has been seen, alive and well."""
1018
self.last_checked_ok = datetime.datetime.utcnow()
1019
self.last_checker_status = 0
1020
self.last_checker_signal = None
1023
def bump_timeout(self, timeout=None):
1024
"""Bump up the timeout for this client."""
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
461
This should only be called when the client has been seen,
1025
464
if timeout is None:
1026
465
timeout = self.timeout
1027
if self.disable_initiator_tag is not None:
1028
GLib.source_remove(self.disable_initiator_tag)
1029
self.disable_initiator_tag = None
1030
if getattr(self, "enabled", False):
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(timeout.total_seconds() * 1000), self.disable)
1033
self.expires = datetime.datetime.utcnow() + timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.expires = datetime.datetime.utcnow() + timeout
469
self.disable_initiator_tag = (gobject.timeout_add
470
(_timedelta_to_milliseconds
471
(timeout), self.disable))
1035
473
def need_approval(self):
1036
474
self.last_approval_request = datetime.datetime.utcnow()
1038
476
def start_checker(self):
1039
477
"""Start a new checker subprocess if one is not running.
1041
479
If a checker already exists, leave it running and do
1043
481
# The reason for not killing a running checker is that if we
1044
# did that, and if a checker (for some reason) started running
1045
# slowly and taking more than 'interval' time, then the client
1046
# would inevitably timeout, since no checker would get a
1047
# chance to run to completion. If we instead leave running
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# a chance to run to completion. If we instead leave running
1048
486
# checkers alone, the checker would have to take more time
1049
487
# than 'timeout' for the client to be disabled, which is as it
1052
if self.checker is not None and not self.checker.is_alive():
1053
logger.warning("Checker was not alive; joining")
490
# If a checker exists, make sure it is not a zombie
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
self.current_checker_command)
1056
503
# Start a new checker if needed
1057
504
if self.checker is None:
1058
# Escape attributes for the shell
1060
attr: re.escape(str(getattr(self, attr)))
1061
for attr in self.runtime_expansions}
1063
command = self.checker_command % escaped_attrs
1064
except TypeError as error:
1065
logger.error('Could not format string "%s"',
1066
self.checker_command,
1068
return True # Try again later
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
509
# Escape attributes for the shell
510
escaped_attrs = dict(
512
re.escape(unicode(str(getattr(self, attr, "")),
516
self.runtime_expansions)
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
return True # Try again later
1069
524
self.current_checker_command = command
1070
logger.info("Starting checker %r for %s", command,
1072
# We don't need to redirect stdout and stderr, since
1073
# in normal mode, that is already done by daemon(),
1074
# and in debug mode we don't want to. (Stdin is
1075
# always replaced by /dev/null.)
1076
# The exception is when not debugging but nevertheless
1077
# running in the foreground; use the previously
1079
popen_args = {"close_fds": True,
1082
if (not self.server_settings["debug"]
1083
and self.server_settings["foreground"]):
1084
popen_args.update({"stdout": wnull,
1086
pipe = multiprocessing.Pipe(duplex=False)
1087
self.checker = multiprocessing.Process(
1089
args=(pipe[1], subprocess.call, command),
1091
self.checker.start()
1092
self.checker_callback_tag = GLib.io_add_watch(
1093
pipe[0].fileno(), GLib.IO_IN,
1094
self.checker_callback, pipe[0], command)
1095
# Re-run this periodically if run by GLib.timeout_add
526
logger.info("Starting checker %r for %s",
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
535
self.checker_callback_tag = (gobject.child_watch_add
537
self.checker_callback,
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
548
# Re-run this periodically if run by gobject.timeout_add
1098
551
def stop_checker(self):
1099
552
"""Force the checker process, if any, to stop."""
1100
553
if self.checker_callback_tag:
1101
GLib.source_remove(self.checker_callback_tag)
554
gobject.source_remove(self.checker_callback_tag)
1102
555
self.checker_callback_tag = None
1103
556
if getattr(self, "checker", None) is None:
1105
558
logger.debug("Stopping checker for %(name)s", vars(self))
1106
self.checker.terminate()
560
os.kill(self.checker.pid, signal.SIGTERM)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
1107
567
self.checker = None
1110
def dbus_service_property(dbus_interface,
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1114
572
"""Decorators for marking methods of a DBusObjectWithProperties to
1115
573
become properties on the D-Bus.
1117
575
The decorated method will be called with no arguments by "Get"
1118
576
and with one argument by "Set".
1120
578
The parameters, where they are supported, are the same as
1121
579
dbus.service.method, except there is only "signature", since the
1122
580
type from Get() and the type sent to Set() is the same.
1205
class DBusObjectWithAnnotations(dbus.service.Object):
1206
"""A D-Bus object with annotations.
1208
Classes inheriting from this can use the dbus_annotations
1209
decorator to add annotations to methods or signals.
1213
def _is_dbus_thing(thing):
1214
"""Returns a function testing if an attribute is a D-Bus thing
1216
If called like _is_dbus_thing("method") it returns a function
1217
suitable for use as predicate to inspect.getmembers().
1219
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1222
def _get_all_dbus_things(self, thing):
1223
"""Returns a generator of (name, attribute) pairs
1225
return ((getattr(athing.__get__(self), "_dbus_name", name),
1226
athing.__get__(self))
1227
for cls in self.__class__.__mro__
1229
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1231
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1233
path_keyword='object_path',
1234
connection_keyword='connection')
1235
def Introspect(self, object_path, connection):
1236
"""Overloading of standard D-Bus method.
1238
Inserts annotation tags on methods and signals.
1240
xmlstring = dbus.service.Object.Introspect(self, object_path,
1243
document = xml.dom.minidom.parseString(xmlstring)
1245
for if_tag in document.getElementsByTagName("interface"):
1246
# Add annotation tags
1247
for typ in ("method", "signal"):
1248
for tag in if_tag.getElementsByTagName(typ):
1250
for name, prop in (self.
1251
_get_all_dbus_things(typ)):
1252
if (name == tag.getAttribute("name")
1253
and prop._dbus_interface
1254
== if_tag.getAttribute("name")):
1255
annots.update(getattr(
1256
prop, "_dbus_annotations", {}))
1257
for name, value in annots.items():
1258
ann_tag = document.createElement(
1260
ann_tag.setAttribute("name", name)
1261
ann_tag.setAttribute("value", value)
1262
tag.appendChild(ann_tag)
1263
# Add interface annotation tags
1264
for annotation, value in dict(
1265
itertools.chain.from_iterable(
1266
annotations().items()
1267
for name, annotations
1268
in self._get_all_dbus_things("interface")
1269
if name == if_tag.getAttribute("name")
1271
ann_tag = document.createElement("annotation")
1272
ann_tag.setAttribute("name", annotation)
1273
ann_tag.setAttribute("value", value)
1274
if_tag.appendChild(ann_tag)
1275
# Fix argument name for the Introspect method itself
1276
if (if_tag.getAttribute("name")
1277
== dbus.INTROSPECTABLE_IFACE):
1278
for cn in if_tag.getElementsByTagName("method"):
1279
if cn.getAttribute("name") == "Introspect":
1280
for arg in cn.getElementsByTagName("arg"):
1281
if (arg.getAttribute("direction")
1283
arg.setAttribute("name",
1285
xmlstring = document.toxml("utf-8")
1287
except (AttributeError, xml.dom.DOMException,
1288
xml.parsers.expat.ExpatError) as error:
1289
logger.error("Failed to override Introspection method",
1294
class DBusObjectWithProperties(DBusObjectWithAnnotations):
619
class DBusObjectWithProperties(dbus.service.Object):
1295
620
"""A D-Bus object with properties.
1297
622
Classes inheriting from this can use the dbus_service_property
1298
623
decorator to expose methods as D-Bus properties. It exposes the
1299
624
standard Get(), Set(), and GetAll() methods on the D-Bus.
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
631
def _get_all_dbus_properties(self):
632
"""Returns a generator of (name, attribute) pairs
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
635
for cls in self.__class__.__mro__
637
inspect.getmembers(cls, self._is_dbus_property))
1302
639
def _get_dbus_property(self, interface_name, property_name):
1303
640
"""Returns a bound method if one exists which is a D-Bus
1304
641
property with the specified name and interface.
1306
for cls in self.__class__.__mro__:
1307
for name, value in inspect.getmembers(
1308
cls, self._is_dbus_thing("property")):
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
1309
646
if (value._dbus_name == property_name
1310
647
and value._dbus_interface == interface_name):
1311
648
return value.__get__(self)
1313
650
# No such property
1314
raise DBusPropertyNotFound("{}:{}.{}".format(
1315
self.dbus_object_path, interface_name, property_name))
1318
def _get_all_interface_names(cls):
1319
"""Get a sequence of all interfaces supported by an object"""
1320
return (name for name in set(getattr(getattr(x, attr),
1321
"_dbus_interface", None)
1322
for x in (inspect.getmro(cls))
1324
if name is not None)
1326
@dbus.service.method(dbus.PROPERTIES_IFACE,
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
655
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1328
656
out_signature="v")
1329
657
def Get(self, interface_name, property_name):
1330
658
"""Standard D-Bus property Get() method, see D-Bus standard.
1455
750
except (AttributeError, xml.dom.DOMException,
1456
751
xml.parsers.expat.ExpatError) as error:
1457
752
logger.error("Failed to override Introspection method",
1462
dbus.OBJECT_MANAGER_IFACE
1463
except AttributeError:
1464
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1467
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1468
"""A D-Bus object with an ObjectManager.
1470
Classes inheriting from this exposes the standard
1471
GetManagedObjects call and the InterfacesAdded and
1472
InterfacesRemoved signals on the standard
1473
"org.freedesktop.DBus.ObjectManager" interface.
1475
Note: No signals are sent automatically; they must be sent
1478
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1479
out_signature="a{oa{sa{sv}}}")
1480
def GetManagedObjects(self):
1481
"""This function must be overridden"""
1482
raise NotImplementedError()
1484
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1485
signature="oa{sa{sv}}")
1486
def InterfacesAdded(self, object_path, interfaces_and_properties):
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1490
def InterfacesRemoved(self, object_path, interfaces):
1493
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1495
path_keyword='object_path',
1496
connection_keyword='connection')
1497
def Introspect(self, object_path, connection):
1498
"""Overloading of standard D-Bus method.
1500
Override return argument name of GetManagedObjects to be
1501
"objpath_interfaces_and_properties"
1503
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1507
document = xml.dom.minidom.parseString(xmlstring)
1509
for if_tag in document.getElementsByTagName("interface"):
1510
# Fix argument name for the GetManagedObjects method
1511
if (if_tag.getAttribute("name")
1512
== dbus.OBJECT_MANAGER_IFACE):
1513
for cn in if_tag.getElementsByTagName("method"):
1514
if (cn.getAttribute("name")
1515
== "GetManagedObjects"):
1516
for arg in cn.getElementsByTagName("arg"):
1517
if (arg.getAttribute("direction")
1521
"objpath_interfaces"
1523
xmlstring = document.toxml("utf-8")
1525
except (AttributeError, xml.dom.DOMException,
1526
xml.parsers.expat.ExpatError) as error:
1527
logger.error("Failed to override Introspection method",
1532
def datetime_to_dbus(dt, variant_level=0):
757
def datetime_to_dbus (dt, variant_level=0):
1533
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1535
return dbus.String("", variant_level=variant_level)
1536
return dbus.String(dt.isoformat(), variant_level=variant_level)
1539
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1540
"""A class decorator; applied to a subclass of
1541
dbus.service.Object, it will add alternate D-Bus attributes with
1542
interface names according to the "alt_interface_names" mapping.
1545
@alternate_dbus_interfaces({"org.example.Interface":
1546
"net.example.AlternateInterface"})
1547
class SampleDBusObject(dbus.service.Object):
1548
@dbus.service.method("org.example.Interface")
1549
def SampleDBusMethod():
1552
The above "SampleDBusMethod" on "SampleDBusObject" will be
1553
reachable via two interfaces: "org.example.Interface" and
1554
"net.example.AlternateInterface", the latter of which will have
1555
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1556
"true", unless "deprecate" is passed with a False value.
1558
This works for methods and signals, and also for D-Bus properties
1559
(from DBusObjectWithProperties) and interfaces (from the
1560
dbus_interface_annotations decorator).
760
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
1564
for orig_interface_name, alt_interface_name in (
1565
alt_interface_names.items()):
1567
interface_names = set()
1568
# Go though all attributes of the class
1569
for attrname, attribute in inspect.getmembers(cls):
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
1570
776
# Ignore non-D-Bus attributes, and D-Bus attributes
1571
777
# with the wrong interface name
1572
778
if (not hasattr(attribute, "_dbus_interface")
1573
or not attribute._dbus_interface.startswith(
1574
orig_interface_name)):
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1576
782
# Create an alternate D-Bus interface name based on
1577
783
# the current name
1578
alt_interface = attribute._dbus_interface.replace(
1579
orig_interface_name, alt_interface_name)
1580
interface_names.add(alt_interface)
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1581
787
# Is this a D-Bus signal?
1582
788
if getattr(attribute, "_dbus_is_signal", False):
1583
# Extract the original non-method undecorated
1584
# function by black magic
1585
if sys.version_info.major == 2:
1586
nonmethod_func = (dict(
789
# Extract the original non-method function by
791
nonmethod_func = (dict(
1587
792
zip(attribute.func_code.co_freevars,
1588
attribute.__closure__))
1589
["func"].cell_contents)
1591
nonmethod_func = (dict(
1592
zip(attribute.__code__.co_freevars,
1593
attribute.__closure__))
1594
["func"].cell_contents)
793
attribute.__closure__))["func"]
1595
795
# Create a new, but exactly alike, function
1596
796
# object, and decorate it to be a new D-Bus signal
1597
797
# with the alternate D-Bus interface name
1598
new_function = copy_function(nonmethod_func)
1599
new_function = (dbus.service.signal(
1601
attribute._dbus_signature)(new_function))
1602
# Copy annotations, if any
1604
new_function._dbus_annotations = dict(
1605
attribute._dbus_annotations)
1606
except AttributeError:
798
new_function = (dbus.service.signal
800
attribute._dbus_signature)
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
nonmethod_func.func_closure)))
1609
807
# Define a creator of a function to call both the
1610
# original and alternate functions, so both the
1611
# original and alternate signals gets sent when
1612
# the function is called
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1613
810
def fixscope(func1, func2):
1614
811
"""This function is a scope container to pass
1615
812
func1 and func2 to the "call_both" function
1616
813
outside of its arguments"""
1618
@functools.wraps(func2)
1619
814
def call_both(*args, **kwargs):
1620
815
"""This function will emit two D-Bus
1621
816
signals by calling func1 and func2"""
1622
817
func1(*args, **kwargs)
1623
818
func2(*args, **kwargs)
1624
# Make wrapper function look like a D-Bus
1626
for name, attr in inspect.getmembers(func2):
1627
if name.startswith("_dbus_"):
1628
setattr(call_both, name, attr)
1630
819
return call_both
1631
820
# Create the "call_both" function and add it to
1633
attr[attrname] = fixscope(attribute, new_function)
822
attr[attrname] = fixscope(attribute,
1634
824
# Is this a D-Bus method?
1635
825
elif getattr(attribute, "_dbus_is_method", False):
1636
826
# Create a new, but exactly alike, function
1637
827
# object. Decorate it to be a new D-Bus method
1638
828
# with the alternate D-Bus interface name. Add it
1641
dbus.service.method(
1643
attribute._dbus_in_signature,
1644
attribute._dbus_out_signature)
1645
(copy_function(attribute)))
1646
# Copy annotations, if any
1648
attr[attrname]._dbus_annotations = dict(
1649
attribute._dbus_annotations)
1650
except AttributeError:
830
attr[attrname] = (dbus.service.method
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
835
(attribute.func_code,
836
attribute.func_globals,
838
attribute.func_defaults,
839
attribute.func_closure)))
1652
840
# Is this a D-Bus property?
1653
841
elif getattr(attribute, "_dbus_is_property", False):
1654
842
# Create a new, but exactly alike, function
1655
843
# object, and decorate it to be a new D-Bus
1656
844
# property with the alternate D-Bus interface
1657
845
# name. Add it to the class.
1658
attr[attrname] = (dbus_service_property(
1659
alt_interface, attribute._dbus_signature,
1660
attribute._dbus_access,
1661
attribute._dbus_get_args_options
1663
(copy_function(attribute)))
1664
# Copy annotations, if any
1666
attr[attrname]._dbus_annotations = dict(
1667
attribute._dbus_annotations)
1668
except AttributeError:
1670
# Is this a D-Bus interface?
1671
elif getattr(attribute, "_dbus_is_interface", False):
1672
# Create a new, but exactly alike, function
1673
# object. Decorate it to be a new D-Bus interface
1674
# with the alternate D-Bus interface name. Add it
1677
dbus_interface_annotations(alt_interface)
1678
(copy_function(attribute)))
1680
# Deprecate all alternate interfaces
1681
iname = "_AlternateDBusNames_interface_annotation{}"
1682
for interface_name in interface_names:
1684
@dbus_interface_annotations(interface_name)
1686
return {"org.freedesktop.DBus.Deprecated":
1688
# Find an unused name
1689
for aname in (iname.format(i)
1690
for i in itertools.count()):
1691
if aname not in attr:
1695
# Replace the class with a new subclass of it with
1696
# methods, signals, etc. as created above.
1697
if sys.version_info.major == 2:
1698
cls = type(b"{}Alternate".format(cls.__name__),
1701
cls = type("{}Alternate".format(cls.__name__),
1708
@alternate_dbus_interfaces({"se.recompile.Mandos":
1709
"se.bsnet.fukt.Mandos"})
846
attr[attrname] = (dbus_service_property
848
attribute._dbus_signature,
849
attribute._dbus_access,
851
._dbus_get_args_options
854
(attribute.func_code,
855
attribute.func_globals,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
1710
861
class ClientDBus(Client, DBusObjectWithProperties):
1711
862
"""A Client class using D-Bus
1714
865
dbus_object_path: dbus.ObjectPath
1715
866
bus: dbus.SystemBus()
1718
869
runtime_expansions = (Client.runtime_expansions
1719
+ ("dbus_object_path", ))
1721
_interface = "se.recompile.Mandos.Client"
870
+ ("dbus_object_path",))
1723
872
# dbus.service.Object doesn't use super(), so we can't either.
1725
def __init__(self, bus=None, *args, **kwargs):
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
1727
877
Client.__init__(self, *args, **kwargs)
1728
878
# Only now, when this client is initialized, can it show up on
1730
client_object_name = str(self.name).translate(
880
client_object_name = unicode(self.name).translate(
1731
881
{ord("."): ord("_"),
1732
882
ord("-"): ord("_")})
1733
self.dbus_object_path = dbus.ObjectPath(
1734
"/clients/" + client_object_name)
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1735
885
DBusObjectWithProperties.__init__(self, self.bus,
1736
886
self.dbus_object_path)
1738
def notifychangeproperty(transform_func, dbus_name,
1739
type_func=lambda x: x,
1741
invalidate_only=False,
1742
_interface=_interface):
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
1743
891
""" Modify a variable so that it's a property which announces
1744
892
its changes to DBus.
1746
transform_fun: Function that takes a value and a variant_level
1747
and transforms it to a D-Bus type.
894
transform_fun: Function that takes a value and transforms it
1748
896
dbus_name: D-Bus name of the variable
1749
897
type_func: Function that transform the value before sending it
1750
898
to the D-Bus. Default: no transform
1751
899
variant_level: D-Bus variant level. Default: 1
1753
attrname = "_{}".format(dbus_name)
901
attrname = "_{0}".format(dbus_name)
1755
902
def setter(self, value):
1756
903
if hasattr(self, "dbus_object_path"):
1757
904
if (not hasattr(self, attrname) or
1758
905
type_func(getattr(self, attrname, None))
1759
906
!= type_func(value)):
1761
self.PropertiesChanged(
1762
_interface, dbus.Dictionary(),
1763
dbus.Array((dbus_name, )))
1765
dbus_value = transform_func(
1767
variant_level=variant_level)
1768
self.PropertyChanged(dbus.String(dbus_name),
1770
self.PropertiesChanged(
1772
dbus.Dictionary({dbus.String(dbus_name):
907
dbus_value = transform_func(type_func(value),
909
self.PropertyChanged(dbus.String(dbus_name),
1775
911
setattr(self, attrname, value)
1777
913
return property(lambda self: getattr(self, attrname), setter)
1779
916
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1780
917
approvals_pending = notifychangeproperty(dbus.Boolean,
1781
918
"ApprovalPending",
1783
920
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1784
921
last_enabled = notifychangeproperty(datetime_to_dbus,
1786
checker = notifychangeproperty(
1787
dbus.Boolean, "CheckerRunning",
1788
type_func=lambda checker: checker is not None)
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
1789
926
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1790
927
"LastCheckedOK")
1791
last_checker_status = notifychangeproperty(dbus.Int16,
1792
"LastCheckerStatus")
1793
928
last_approval_request = notifychangeproperty(
1794
929
datetime_to_dbus, "LastApprovalRequest")
1795
930
approved_by_default = notifychangeproperty(dbus.Boolean,
1796
931
"ApprovedByDefault")
1797
approval_delay = notifychangeproperty(
1798
dbus.UInt64, "ApprovalDelay",
1799
type_func=lambda td: td.total_seconds() * 1000)
932
approval_delay = notifychangeproperty(dbus.UInt16,
935
_timedelta_to_milliseconds)
1800
936
approval_duration = notifychangeproperty(
1801
dbus.UInt64, "ApprovalDuration",
1802
type_func=lambda td: td.total_seconds() * 1000)
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1803
939
host = notifychangeproperty(dbus.String, "Host")
1804
timeout = notifychangeproperty(
1805
dbus.UInt64, "Timeout",
1806
type_func=lambda td: td.total_seconds() * 1000)
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
942
_timedelta_to_milliseconds)
1807
943
extended_timeout = notifychangeproperty(
1808
dbus.UInt64, "ExtendedTimeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1810
interval = notifychangeproperty(
1811
dbus.UInt64, "Interval",
1812
type_func=lambda td: td.total_seconds() * 1000)
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
949
_timedelta_to_milliseconds)
1813
950
checker_command = notifychangeproperty(dbus.String, "Checker")
1814
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1815
invalidate_only=True)
1817
952
del notifychangeproperty
1819
954
def __del__(self, *args, **kwargs):
1821
956
self.remove_from_connection()
2301
1418
delay -= time2 - time
2304
session.send(client.secret)
2305
except gnutls.Error as error:
2306
logger.warning("gnutls send failed",
1421
while sent_size < len(client.secret):
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
2310
1432
logger.info("Sending secret to %s", client.name)
2311
# bump the timeout using extended_timeout
2312
client.bump_timeout(client.extended_timeout)
1433
# bump the timeout as if seen
1434
client.checked_ok(client.extended_timeout)
2313
1435
if self.server.use_dbus:
2314
1436
# Emit D-Bus signal
2315
1437
client.GotSecret()
2318
1440
if approval_required:
2319
1441
client.approvals_pending -= 1
2322
except gnutls.Error as error:
2323
logger.warning("GnuTLS bye failed",
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
2327
1448
def peer_certificate(session):
2328
1449
"Return the peer's OpenPGP certificate as a bytestring"
2329
1450
# If not an OpenPGP certificate...
2330
if (gnutls.certificate_type_get(session._c_object)
2331
!= gnutls.CRT_OPENPGP):
2332
# ...return invalid data
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2334
1456
list_size = ctypes.c_uint(1)
2335
cert_list = (gnutls.certificate_get_peers
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2336
1459
(session._c_object, ctypes.byref(list_size)))
2337
1460
if not bool(cert_list) and list_size.value != 0:
2338
raise gnutls.Error("error getting peer certificate")
1461
raise gnutls.errors.GNUTLSError("error getting peer"
2339
1463
if list_size.value == 0:
2341
1465
cert = cert_list[0]
2342
1466
return ctypes.string_at(cert.data, cert.size)
2345
1469
def fingerprint(openpgp):
2346
1470
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2347
1471
# New GnuTLS "datum" with the OpenPGP public key
2348
datum = gnutls.datum_t(
2349
ctypes.cast(ctypes.c_char_p(openpgp),
2350
ctypes.POINTER(ctypes.c_ubyte)),
2351
ctypes.c_uint(len(openpgp)))
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1476
ctypes.c_uint(len(openpgp))))
2352
1477
# New empty GnuTLS certificate
2353
crt = gnutls.openpgp_crt_t()
2354
gnutls.openpgp_crt_init(ctypes.byref(crt))
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2355
1481
# Import the OpenPGP public key into the certificate
2356
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2357
gnutls.OPENPGP_FMT_RAW)
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2358
1486
# Verify the self signature in the key
2359
1487
crtverify = ctypes.c_uint()
2360
gnutls.openpgp_crt_verify_self(crt, 0,
2361
ctypes.byref(crtverify))
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2362
1491
if crtverify.value != 0:
2363
gnutls.openpgp_crt_deinit(crt)
2364
raise gnutls.CertificateSecurityError("Verify failed")
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
2365
1495
# New buffer for the fingerprint
2366
1496
buf = ctypes.create_string_buffer(20)
2367
1497
buf_len = ctypes.c_size_t()
2368
1498
# Get the fingerprint from the certificate into the buffer
2369
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2370
ctypes.byref(buf_len))
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2371
1502
# Deinit the certificate
2372
gnutls.openpgp_crt_deinit(crt)
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2373
1504
# Convert the buffer to a Python bytestring
2374
1505
fpr = ctypes.string_at(buf, buf_len.value)
2375
1506
# Convert the bytestring to hexadecimal notation
2376
hex_fpr = binascii.hexlify(fpr).upper()
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2380
1511
class MultiprocessingMixIn(object):
2381
1512
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2383
1513
def sub_process_main(self, request, address):
2385
1515
self.finish_request(request, address)
2387
1517
self.handle_error(request, address)
2388
1518
self.close_request(request)
2390
1520
def process_request(self, request, address):
2391
1521
"""Start a new process to process the request."""
2392
proc = multiprocessing.Process(target=self.sub_process_main,
2393
args=(request, address))
1522
multiprocessing.Process(target = self.sub_process_main,
1523
args = (request, address)).start()
2398
1526
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2399
1527
""" adds a pipe to the MixIn """
2401
1528
def process_request(self, request, client_address):
2402
1529
"""Overrides and wraps the original process_request().
2404
1531
This function creates a new pipe in self.pipe
2406
1533
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2408
proc = MultiprocessingMixIn.process_request(self, request,
1535
super(MultiprocessingMixInWithPipe,
1536
self).process_request(request, client_address)
2410
1537
self.child_pipe.close()
2411
self.add_pipe(parent_pipe, proc)
2413
def add_pipe(self, parent_pipe, proc):
1538
self.add_pipe(parent_pipe)
1540
def add_pipe(self, parent_pipe):
2414
1541
"""Dummy function; override as necessary"""
2415
raise NotImplementedError()
1542
raise NotImplementedError
2418
1545
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2419
1546
socketserver.TCPServer, object):
2420
1547
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2423
1550
enabled: Boolean; whether this server is activated yet
2424
1551
interface: None or a network interface name (string)
2425
1552
use_ipv6: Boolean; to use IPv6 or not
2428
1554
def __init__(self, server_address, RequestHandlerClass,
2432
"""If socketfd is set, use that file descriptor instead of
2433
creating a new one with socket.socket().
1555
interface=None, use_ipv6=True):
2435
1556
self.interface = interface
2437
1558
self.address_family = socket.AF_INET6
2438
if socketfd is not None:
2439
# Save the file descriptor
2440
self.socketfd = socketfd
2441
# Save the original socket.socket() function
2442
self.socket_socket = socket.socket
2444
# To implement --socket, we monkey patch socket.socket.
2446
# (When socketserver.TCPServer is a new-style class, we
2447
# could make self.socket into a property instead of monkey
2448
# patching socket.socket.)
2450
# Create a one-time-only replacement for socket.socket()
2451
@functools.wraps(socket.socket)
2452
def socket_wrapper(*args, **kwargs):
2453
# Restore original function so subsequent calls are
2455
socket.socket = self.socket_socket
2456
del self.socket_socket
2457
# This time only, return a new socket object from the
2458
# saved file descriptor.
2459
return socket.fromfd(self.socketfd, *args, **kwargs)
2460
# Replace socket.socket() function with wrapper
2461
socket.socket = socket_wrapper
2462
# The socketserver.TCPServer.__init__ will call
2463
# socket.socket(), which might be our replacement,
2464
# socket_wrapper(), if socketfd was set.
2465
1559
socketserver.TCPServer.__init__(self, server_address,
2466
1560
RequestHandlerClass)
2468
1561
def server_bind(self):
2469
1562
"""This overrides the normal server_bind() function
2470
1563
to bind to an interface if one was specified, and also NOT to
2471
1564
bind to an address or port if they were not specified."""
2472
global SO_BINDTODEVICE
2473
1565
if self.interface is not None:
2474
1566
if SO_BINDTODEVICE is None:
2475
# Fall back to a hard-coded value which seems to be
2477
logger.warning("SO_BINDTODEVICE not found, trying 25")
2478
SO_BINDTODEVICE = 25
2480
self.socket.setsockopt(
2481
socket.SOL_SOCKET, SO_BINDTODEVICE,
2482
(self.interface + "\0").encode("utf-8"))
2483
except socket.error as error:
2484
if error.errno == errno.EPERM:
2485
logger.error("No permission to bind to"
2486
" interface %s", self.interface)
2487
elif error.errno == errno.ENOPROTOOPT:
2488
logger.error("SO_BINDTODEVICE not available;"
2489
" cannot bind to interface %s",
2491
elif error.errno == errno.ENODEV:
2492
logger.error("Interface %s does not exist,"
2493
" cannot bind", self.interface)
1567
logger.error("SO_BINDTODEVICE does not exist;"
1568
" cannot bind to interface %s",
1572
self.socket.setsockopt(socket.SOL_SOCKET,
1576
except socket.error as error:
1577
if error[0] == errno.EPERM:
1578
logger.error("No permission to"
1579
" bind to interface %s",
1581
elif error[0] == errno.ENOPROTOOPT:
1582
logger.error("SO_BINDTODEVICE not available;"
1583
" cannot bind to interface %s",
2496
1587
# Only bind(2) the socket if we really need to.
2497
1588
if self.server_address[0] or self.server_address[1]:
2498
1589
if not self.server_address[0]:
2499
1590
if self.address_family == socket.AF_INET6:
2500
any_address = "::" # in6addr_any
1591
any_address = "::" # in6addr_any
2502
any_address = "0.0.0.0" # INADDR_ANY
1593
any_address = socket.INADDR_ANY
2503
1594
self.server_address = (any_address,
2504
1595
self.server_address[1])
2505
1596
elif not self.server_address[1]:
2506
self.server_address = (self.server_address[0], 0)
1597
self.server_address = (self.server_address[0],
2507
1599
# if self.interface:
2508
1600
# self.server_address = (self.server_address[0],
2606
1698
funcname = request[1]
2607
1699
args = request[2]
2608
1700
kwargs = request[3]
2610
1702
parent_pipe.send(('data', getattr(client_object,
2611
1703
funcname)(*args,
2614
1706
if command == 'getattr':
2615
1707
attrname = request[1]
2616
if isinstance(client_object.__getattribute__(attrname),
2617
collections.Callable):
2618
parent_pipe.send(('function', ))
1708
if callable(client_object.__getattribute__(attrname)):
1709
parent_pipe.send(('function',))
2621
'data', client_object.__getattribute__(attrname)))
1711
parent_pipe.send(('data', client_object
1712
.__getattribute__(attrname)))
2623
1714
if command == 'setattr':
2624
1715
attrname = request[1]
2625
1716
value = request[2]
2626
1717
setattr(client_object, attrname, value)
2631
def rfc3339_duration_to_delta(duration):
2632
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2634
>>> rfc3339_duration_to_delta("P7D")
2635
datetime.timedelta(7)
2636
>>> rfc3339_duration_to_delta("PT60S")
2637
datetime.timedelta(0, 60)
2638
>>> rfc3339_duration_to_delta("PT60M")
2639
datetime.timedelta(0, 3600)
2640
>>> rfc3339_duration_to_delta("PT24H")
2641
datetime.timedelta(1)
2642
>>> rfc3339_duration_to_delta("P1W")
2643
datetime.timedelta(7)
2644
>>> rfc3339_duration_to_delta("PT5M30S")
2645
datetime.timedelta(0, 330)
2646
>>> rfc3339_duration_to_delta("P1DT3M20S")
2647
datetime.timedelta(1, 200)
2650
# Parsing an RFC 3339 duration with regular expressions is not
2651
# possible - there would have to be multiple places for the same
2652
# values, like seconds. The current code, while more esoteric, is
2653
# cleaner without depending on a parsing library. If Python had a
2654
# built-in library for parsing we would use it, but we'd like to
2655
# avoid excessive use of external libraries.
2657
# New type for defining tokens, syntax, and semantics all-in-one
2658
Token = collections.namedtuple("Token", (
2659
"regexp", # To match token; if "value" is not None, must have
2660
# a "group" containing digits
2661
"value", # datetime.timedelta or None
2662
"followers")) # Tokens valid after this token
2663
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2664
# the "duration" ABNF definition in RFC 3339, Appendix A.
2665
token_end = Token(re.compile(r"$"), None, frozenset())
2666
token_second = Token(re.compile(r"(\d+)S"),
2667
datetime.timedelta(seconds=1),
2668
frozenset((token_end, )))
2669
token_minute = Token(re.compile(r"(\d+)M"),
2670
datetime.timedelta(minutes=1),
2671
frozenset((token_second, token_end)))
2672
token_hour = Token(re.compile(r"(\d+)H"),
2673
datetime.timedelta(hours=1),
2674
frozenset((token_minute, token_end)))
2675
token_time = Token(re.compile(r"T"),
2677
frozenset((token_hour, token_minute,
2679
token_day = Token(re.compile(r"(\d+)D"),
2680
datetime.timedelta(days=1),
2681
frozenset((token_time, token_end)))
2682
token_month = Token(re.compile(r"(\d+)M"),
2683
datetime.timedelta(weeks=4),
2684
frozenset((token_day, token_end)))
2685
token_year = Token(re.compile(r"(\d+)Y"),
2686
datetime.timedelta(weeks=52),
2687
frozenset((token_month, token_end)))
2688
token_week = Token(re.compile(r"(\d+)W"),
2689
datetime.timedelta(weeks=1),
2690
frozenset((token_end, )))
2691
token_duration = Token(re.compile(r"P"), None,
2692
frozenset((token_year, token_month,
2693
token_day, token_time,
2695
# Define starting values:
2697
value = datetime.timedelta()
2699
# Following valid tokens
2700
followers = frozenset((token_duration, ))
2701
# String left to parse
2703
# Loop until end token is found
2704
while found_token is not token_end:
2705
# Search for any currently valid tokens
2706
for token in followers:
2707
match = token.regexp.match(s)
2708
if match is not None:
2710
if token.value is not None:
2711
# Value found, parse digits
2712
factor = int(match.group(1), 10)
2713
# Add to value so far
2714
value += factor * token.value
2715
# Strip token from string
2716
s = token.regexp.sub("", s, 1)
2719
# Set valid next tokens
2720
followers = found_token.followers
2723
# No currently valid tokens were found
2724
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
1722
def string_to_delta(interval):
2731
1723
"""Parse a string and return a datetime.timedelta
2733
1725
>>> string_to_delta('7d')
2734
1726
datetime.timedelta(7)
2735
1727
>>> string_to_delta('60s')
2830
1840
parser.add_argument("--no-dbus", action="store_false",
2831
1841
dest="use_dbus", help="Do not provide D-Bus"
2832
" system bus interface", default=None)
1842
" system bus interface")
2833
1843
parser.add_argument("--no-ipv6", action="store_false",
2834
dest="use_ipv6", help="Do not use IPv6",
2836
parser.add_argument("--no-restore", action="store_false",
2837
dest="restore", help="Do not restore stored"
2838
" state", default=None)
2839
parser.add_argument("--socket", type=int,
2840
help="Specify a file descriptor to a network"
2841
" socket to use instead of creating one")
2842
parser.add_argument("--statedir", metavar="DIR",
2843
help="Directory to save/restore state in")
2844
parser.add_argument("--foreground", action="store_true",
2845
help="Run in foreground", default=None)
2846
parser.add_argument("--no-zeroconf", action="store_false",
2847
dest="zeroconf", help="Do not use Zeroconf",
1844
dest="use_ipv6", help="Do not use IPv6")
2850
1845
options = parser.parse_args()
2852
1847
if options.check:
2854
fail_count, test_count = doctest.testmod()
2855
sys.exit(os.EX_OK if fail_count == 0 else 1)
2857
1852
# Default values for config file for server-global settings
2858
server_defaults = {"interface": "",
2863
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2864
":+SIGN-DSA-SHA256",
2865
"servicename": "Mandos",
2871
"statedir": "/var/lib/mandos",
2872
"foreground": "False",
1853
server_defaults = { "interface": "",
1858
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1859
"servicename": "Mandos",
2876
1865
# Parse config file for server-global settings
2877
1866
server_config = configparser.SafeConfigParser(server_defaults)
2878
1867
del server_defaults
2879
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1868
server_config.read(os.path.join(options.configdir,
2880
1870
# Convert the SafeConfigParser object to a dict
2881
1871
server_settings = server_config.defaults()
2882
1872
# Use the appropriate methods on the non-string config options
2883
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1873
for option in ("debug", "use_dbus", "use_ipv6"):
2884
1874
server_settings[option] = server_config.getboolean("DEFAULT",
2886
1876
if server_settings["port"]:
2887
1877
server_settings["port"] = server_config.getint("DEFAULT",
2889
if server_settings["socket"]:
2890
server_settings["socket"] = server_config.getint("DEFAULT",
2892
# Later, stdin will, and stdout and stderr might, be dup'ed
2893
# over with an opened os.devnull. But we don't want this to
2894
# happen with a supplied network socket.
2895
if 0 <= server_settings["socket"] <= 2:
2896
server_settings["socket"] = os.dup(server_settings
2898
1879
del server_config
2900
1881
# Override the settings from the config file with command line
2901
1882
# options, if set.
2902
1883
for option in ("interface", "address", "port", "debug",
2903
"priority", "servicename", "configdir", "use_dbus",
2904
"use_ipv6", "debuglevel", "restore", "statedir",
2905
"socket", "foreground", "zeroconf"):
1884
"priority", "servicename", "configdir",
1885
"use_dbus", "use_ipv6", "debuglevel"):
2906
1886
value = getattr(options, option)
2907
1887
if value is not None:
2908
1888
server_settings[option] = value
2910
1890
# Force all strings to be unicode
2911
1891
for option in server_settings.keys():
2912
if isinstance(server_settings[option], bytes):
2913
server_settings[option] = (server_settings[option]
2915
# Force all boolean options to be boolean
2916
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2917
"foreground", "zeroconf"):
2918
server_settings[option] = bool(server_settings[option])
2919
# Debug implies foreground
2920
if server_settings["debug"]:
2921
server_settings["foreground"] = True
1892
if type(server_settings[option]) is str:
1893
server_settings[option] = unicode(server_settings[option])
2922
1894
# Now we have our good server settings in "server_settings"
2924
1896
##################################################################
2926
if (not server_settings["zeroconf"]
2927
and not (server_settings["port"]
2928
or server_settings["socket"] != "")):
2929
parser.error("Needs port or socket to work without Zeroconf")
2931
1898
# For convenience
2932
1899
debug = server_settings["debug"]
2933
1900
debuglevel = server_settings["debuglevel"]
2934
1901
use_dbus = server_settings["use_dbus"]
2935
1902
use_ipv6 = server_settings["use_ipv6"]
2936
stored_state_path = os.path.join(server_settings["statedir"],
2938
foreground = server_settings["foreground"]
2939
zeroconf = server_settings["zeroconf"]
2942
initlogger(debug, logging.DEBUG)
2947
level = getattr(logging, debuglevel.upper())
2948
initlogger(debug, level)
2950
1904
if server_settings["servicename"] != "Mandos":
2951
syslogger.setFormatter(
2952
logging.Formatter('Mandos ({}) [%(process)d]:'
2953
' %(levelname)s: %(message)s'.format(
2954
server_settings["servicename"])))
1905
syslogger.setFormatter(logging.Formatter
1906
('Mandos (%s) [%%(process)d]:'
1907
' %%(levelname)s: %%(message)s'
1908
% server_settings["servicename"]))
2956
1910
# Parse config file with clients
2957
client_config = configparser.SafeConfigParser(Client
1911
client_defaults = { "timeout": "5m",
1912
"extended_timeout": "15m",
1914
"checker": "fping -q -- %%(host)s",
1916
"approval_delay": "0s",
1917
"approval_duration": "1s",
1919
client_config = configparser.SafeConfigParser(client_defaults)
2959
1920
client_config.read(os.path.join(server_settings["configdir"],
2960
1921
"clients.conf"))
2962
1923
global mandos_dbus_service
2963
1924
mandos_dbus_service = None
2966
if server_settings["socket"] != "":
2967
socketfd = server_settings["socket"]
2968
tcp_server = MandosServer(
2969
(server_settings["address"], server_settings["port"]),
2971
interface=(server_settings["interface"] or None),
2973
gnutls_priority=server_settings["priority"],
2977
pidfilename = "/run/mandos.pid"
2978
if not os.path.isdir("/run/."):
2979
pidfilename = "/var/run/mandos.pid"
2982
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2983
except IOError as e:
2984
logger.error("Could not open file %r", pidfilename,
2987
for name, group in (("_mandos", "_mandos"),
2988
("mandos", "mandos"),
2989
("nobody", "nogroup")):
2991
uid = pwd.getpwnam(name).pw_uid
2992
gid = pwd.getpwnam(group).pw_gid
1926
tcp_server = MandosServer((server_settings["address"],
1927
server_settings["port"]),
1929
interface=(server_settings["interface"]
1933
server_settings["priority"],
1936
pidfilename = "/var/run/mandos.pid"
1938
pidfile = open(pidfilename, "w")
1940
logger.error("Could not open file %r", pidfilename)
1943
uid = pwd.getpwnam("_mandos").pw_uid
1944
gid = pwd.getpwnam("_mandos").pw_gid
1947
uid = pwd.getpwnam("mandos").pw_uid
1948
gid = pwd.getpwnam("mandos").pw_gid
2994
1949
except KeyError:
1951
uid = pwd.getpwnam("nobody").pw_uid
1952
gid = pwd.getpwnam("nobody").pw_gid
3003
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3005
1959
except OSError as error:
3006
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3007
.format(uid, gid, os.strerror(error.errno)))
3008
if error.errno != errno.EPERM:
1960
if error[0] != errno.EPERM:
1963
if not debug and not debuglevel:
1964
syslogger.setLevel(logging.WARNING)
1965
console.setLevel(logging.WARNING)
1967
level = getattr(logging, debuglevel.upper())
1968
syslogger.setLevel(level)
1969
console.setLevel(level)
3012
1972
# Enable all possible GnuTLS debugging
3014
1974
# "Use a log level over 10 to enable all debugging options."
3015
1975
# - GnuTLS manual
3016
gnutls.global_set_log_level(11)
1976
gnutls.library.functions.gnutls_global_set_log_level(11)
1978
@gnutls.library.types.gnutls_log_func
3019
1979
def debug_gnutls(level, string):
3020
1980
logger.debug("GnuTLS: %s", string[:-1])
3022
gnutls.global_set_log_function(debug_gnutls)
1982
(gnutls.library.functions
1983
.gnutls_global_set_log_function(debug_gnutls))
3024
1985
# Redirect stdin so all checkers get /dev/null
3025
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1986
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3026
1987
os.dup2(null, sys.stdin.fileno())
1991
# No console logging
1992
logger.removeHandler(console)
3030
1994
# Need to fork before connecting to D-Bus
3032
1996
# Close all input and output, do double fork, etc.
3035
# multiprocessing will use threads, so before we use GLib we need
3036
# to inform GLib that threads will be used.
3039
1999
global main_loop
3040
2000
# From the Avahi example code
3041
DBusGMainLoop(set_as_default=True)
3042
main_loop = GLib.MainLoop()
2001
DBusGMainLoop(set_as_default=True )
2002
main_loop = gobject.MainLoop()
3043
2003
bus = dbus.SystemBus()
3044
2004
# End of Avahi example code
3047
2007
bus_name = dbus.service.BusName("se.recompile.Mandos",
3050
old_bus_name = dbus.service.BusName(
3051
"se.bsnet.fukt.Mandos", bus,
3053
except dbus.exceptions.DBusException as e:
3054
logger.error("Disabling D-Bus:", exc_info=e)
2008
bus, do_not_queue=True)
2009
old_bus_name = (dbus.service.BusName
2010
("se.bsnet.fukt.Mandos", bus,
2012
except dbus.exceptions.NameExistsException as e:
2013
logger.error(unicode(e) + ", disabling D-Bus")
3055
2014
use_dbus = False
3056
2015
server_settings["use_dbus"] = False
3057
2016
tcp_server.use_dbus = False
3059
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3060
service = AvahiServiceToSyslog(
3061
name=server_settings["servicename"],
3062
servicetype="_mandos._tcp",
3065
if server_settings["interface"]:
3066
service.interface = if_nametoindex(
3067
server_settings["interface"].encode("utf-8"))
2017
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2018
service = AvahiService(name = server_settings["servicename"],
2019
servicetype = "_mandos._tcp",
2020
protocol = protocol, bus = bus)
2021
if server_settings["interface"]:
2022
service.interface = (if_nametoindex
2023
(str(server_settings["interface"])))
3069
2025
global multiprocessing_manager
3070
2026
multiprocessing_manager = multiprocessing.Manager()
3072
2028
client_class = Client
3074
client_class = functools.partial(ClientDBus, bus=bus)
3076
client_settings = Client.config_parser(client_config)
3077
old_client_settings = {}
3080
# This is used to redirect stdout and stderr for checker processes
3082
wnull = open(os.devnull, "w") # A writable /dev/null
3083
# Only used if server is running in foreground but not in debug
3085
if debug or not foreground:
3088
# Get client data and settings from last running state.
3089
if server_settings["restore"]:
3091
with open(stored_state_path, "rb") as stored_state:
3092
if sys.version_info.major == 2:
3093
clients_data, old_client_settings = pickle.load(
3096
bytes_clients_data, bytes_old_client_settings = (
3097
pickle.load(stored_state, encoding="bytes"))
3098
# Fix bytes to strings
3101
clients_data = {(key.decode("utf-8")
3102
if isinstance(key, bytes)
3105
bytes_clients_data.items()}
3106
del bytes_clients_data
3107
for key in clients_data:
3108
value = {(k.decode("utf-8")
3109
if isinstance(k, bytes) else k): v
3111
clients_data[key].items()}
3112
clients_data[key] = value
3114
value["client_structure"] = [
3116
if isinstance(s, bytes)
3118
value["client_structure"]]
3120
for k in ("name", "host"):
3121
if isinstance(value[k], bytes):
3122
value[k] = value[k].decode("utf-8")
3123
# old_client_settings
3125
old_client_settings = {
3126
(key.decode("utf-8")
3127
if isinstance(key, bytes)
3130
bytes_old_client_settings.items()}
3131
del bytes_old_client_settings
3133
for value in old_client_settings.values():
3134
if isinstance(value["host"], bytes):
3135
value["host"] = (value["host"]
3137
os.remove(stored_state_path)
3138
except IOError as e:
3139
if e.errno == errno.ENOENT:
3140
logger.warning("Could not load persistent state:"
3141
" {}".format(os.strerror(e.errno)))
3143
logger.critical("Could not load persistent state:",
3146
except EOFError as e:
3147
logger.warning("Could not load persistent state: "
3151
with PGPEngine() as pgp:
3152
for client_name, client in clients_data.items():
3153
# Skip removed clients
3154
if client_name not in client_settings:
3157
# Decide which value to use after restoring saved state.
3158
# We have three different values: Old config file,
3159
# new config file, and saved state.
3160
# New config value takes precedence if it differs from old
3161
# config value, otherwise use saved state.
3162
for name, value in client_settings[client_name].items():
3164
# For each value in new config, check if it
3165
# differs from the old config value (Except for
3166
# the "secret" attribute)
3167
if (name != "secret"
3169
old_client_settings[client_name][name])):
3170
client[name] = value
3174
# Clients who has passed its expire date can still be
3175
# enabled if its last checker was successful. A Client
3176
# whose checker succeeded before we stored its state is
3177
# assumed to have successfully run all checkers during
3179
if client["enabled"]:
3180
if datetime.datetime.utcnow() >= client["expires"]:
3181
if not client["last_checked_ok"]:
3183
"disabling client {} - Client never "
3184
"performed a successful checker".format(
3186
client["enabled"] = False
3187
elif client["last_checker_status"] != 0:
3189
"disabling client {} - Client last"
3190
" checker failed with error code"
3193
client["last_checker_status"]))
3194
client["enabled"] = False
3196
client["expires"] = (
3197
datetime.datetime.utcnow()
3198
+ client["timeout"])
3199
logger.debug("Last checker succeeded,"
3200
" keeping {} enabled".format(
2030
client_class = functools.partial(ClientDBusTransitional,
2032
def client_config_items(config, section):
2033
special_settings = {
2034
"approved_by_default":
2035
lambda: config.getboolean(section,
2036
"approved_by_default"),
2038
for name, value in config.items(section):
3203
client["secret"] = pgp.decrypt(
3204
client["encrypted_secret"],
3205
client_settings[client_name]["secret"])
3207
# If decryption fails, we use secret from new settings
3208
logger.debug("Failed to decrypt {} old secret".format(
3210
client["secret"] = (client_settings[client_name]
3213
# Add/remove clients based on new changes made to config
3214
for client_name in (set(old_client_settings)
3215
- set(client_settings)):
3216
del clients_data[client_name]
3217
for client_name in (set(client_settings)
3218
- set(old_client_settings)):
3219
clients_data[client_name] = client_settings[client_name]
3221
# Create all client objects
3222
for client_name, client in clients_data.items():
3223
tcp_server.clients[client_name] = client_class(
3226
server_settings=server_settings)
2040
yield (name, special_settings[name]())
2044
tcp_server.clients.update(set(
2045
client_class(name = section,
2046
config= dict(client_config_items(
2047
client_config, section)))
2048
for section in client_config.sections()))
3228
2049
if not tcp_server.clients:
3229
2050
logger.warning("No clients defined")
3232
if pidfile is not None:
3236
print(pid, file=pidfile)
3238
logger.error("Could not write to file %r with PID %d",
2056
pidfile.write(str(pid) + "\n".encode("utf-8"))
2059
logger.error("Could not write to file %r with PID %d",
2062
# "pidfile" was never created
3241
2064
del pidfilename
3243
for termsig in (signal.SIGHUP, signal.SIGTERM):
3244
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3245
lambda: main_loop.quit() and False)
2066
signal.signal(signal.SIGINT, signal.SIG_IGN)
2068
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2069
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3249
@alternate_dbus_interfaces(
3250
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3251
class MandosDBusService(DBusObjectWithObjectManager):
2072
class MandosDBusService(dbus.service.Object):
3252
2073
"""A D-Bus proxy object"""
3254
2074
def __init__(self):
3255
2075
dbus.service.Object.__init__(self, bus, "/")
3257
2076
_interface = "se.recompile.Mandos"
3259
2078
@dbus.service.signal(_interface, signature="o")
3260
2079
def ClientAdded(self, objpath):
3264
2083
@dbus.service.signal(_interface, signature="ss")
3265
2084
def ClientNotFound(self, fingerprint, address):
3269
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3271
2088
@dbus.service.signal(_interface, signature="os")
3272
2089
def ClientRemoved(self, objpath, name):
3276
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3278
2093
@dbus.service.method(_interface, out_signature="ao")
3279
2094
def GetAllClients(self):
3281
return dbus.Array(c.dbus_object_path for c in
3282
tcp_server.clients.values())
3284
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2096
return dbus.Array(c.dbus_object_path
2097
for c in tcp_server.clients)
3286
2099
@dbus.service.method(_interface,
3287
2100
out_signature="a{oa{sv}}")
3288
2101
def GetAllClientsWithProperties(self):
3290
2103
return dbus.Dictionary(
3291
{c.dbus_object_path: c.GetAll(
3292
"se.recompile.Mandos.Client")
3293
for c in tcp_server.clients.values()},
2104
((c.dbus_object_path, c.GetAll(""))
2105
for c in tcp_server.clients),
3294
2106
signature="oa{sv}")
3296
2108
@dbus.service.method(_interface, in_signature="o")
3297
2109
def RemoveClient(self, object_path):
3299
for c in tcp_server.clients.values():
2111
for c in tcp_server.clients:
3300
2112
if c.dbus_object_path == object_path:
3301
del tcp_server.clients[c.name]
2113
tcp_server.clients.remove(c)
3302
2114
c.remove_from_connection()
3303
# Don't signal the disabling
2115
# Don't signal anything except ClientRemoved
3304
2116
c.disable(quiet=True)
3305
# Emit D-Bus signal for removal
3306
self.client_removed_signal(c)
2118
self.ClientRemoved(object_path, c.name)
3308
2120
raise KeyError(object_path)
3312
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3313
out_signature="a{oa{sa{sv}}}")
3314
def GetManagedObjects(self):
3316
return dbus.Dictionary(
3317
{client.dbus_object_path:
3319
{interface: client.GetAll(interface)
3321
client._get_all_interface_names()})
3322
for client in tcp_server.clients.values()})
3324
def client_added_signal(self, client):
3325
"""Send the new standard signal and the old signal"""
3327
# New standard signal
3328
self.InterfacesAdded(
3329
client.dbus_object_path,
3331
{interface: client.GetAll(interface)
3333
client._get_all_interface_names()}))
3335
self.ClientAdded(client.dbus_object_path)
3337
def client_removed_signal(self, client):
3338
"""Send the new standard signal and the old signal"""
3340
# New standard signal
3341
self.InterfacesRemoved(
3342
client.dbus_object_path,
3343
client._get_all_interface_names())
3345
self.ClientRemoved(client.dbus_object_path,
3348
mandos_dbus_service = MandosDBusService()
3350
# Save modules to variables to exempt the modules from being
3351
# unloaded before the function registered with atexit() is run.
3352
mp = multiprocessing
2124
class MandosDBusServiceTransitional(MandosDBusService):
2125
__metaclass__ = AlternateDBusNamesMetaclass
2126
mandos_dbus_service = MandosDBusServiceTransitional()
3356
2129
"Cleanup function; run on exit"
3360
mp.active_children()
3362
if not (tcp_server.clients or client_settings):
3365
# Store client before exiting. Secrets are encrypted with key
3366
# based on what config file has. If config file is
3367
# removed/edited, old secret will thus be unrecovable.
3369
with PGPEngine() as pgp:
3370
for client in tcp_server.clients.values():
3371
key = client_settings[client.name]["secret"]
3372
client.encrypted_secret = pgp.encrypt(client.secret,
3376
# A list of attributes that can not be pickled
3378
exclude = {"bus", "changedstate", "secret",
3379
"checker", "server_settings"}
3380
for name, typ in inspect.getmembers(dbus.service
3384
client_dict["encrypted_secret"] = (client
3386
for attr in client.client_structure:
3387
if attr not in exclude:
3388
client_dict[attr] = getattr(client, attr)
3390
clients[client.name] = client_dict
3391
del client_settings[client.name]["secret"]
3394
with tempfile.NamedTemporaryFile(
3398
dir=os.path.dirname(stored_state_path),
3399
delete=False) as stored_state:
3400
pickle.dump((clients, client_settings), stored_state,
3402
tempname = stored_state.name
3403
os.rename(tempname, stored_state_path)
3404
except (IOError, OSError) as e:
3410
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3411
logger.warning("Could not save persistent state: {}"
3412
.format(os.strerror(e.errno)))
3414
logger.warning("Could not save persistent state:",
3418
# Delete all clients, and settings from config
3419
2132
while tcp_server.clients:
3420
name, client = tcp_server.clients.popitem()
2133
client = tcp_server.clients.pop()
3422
2135
client.remove_from_connection()
3423
# Don't signal the disabling
2136
client.disable_hook = None
2137
# Don't signal anything except ClientRemoved
3424
2138
client.disable(quiet=True)
3425
# Emit D-Bus signal for removal
3427
mandos_dbus_service.client_removed_signal(client)
3428
client_settings.clear()
2141
mandos_dbus_service.ClientRemoved(client
3430
2145
atexit.register(cleanup)
3432
for client in tcp_server.clients.values():
2147
for client in tcp_server.clients:
3434
# Emit D-Bus signal for adding
3435
mandos_dbus_service.client_added_signal(client)
3436
# Need to initiate checking of clients
3438
client.init_checker()
2150
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3440
2153
tcp_server.enable()
3441
2154
tcp_server.server_activate()
3443
2156
# Find out what port we got
3445
service.port = tcp_server.socket.getsockname()[1]
2157
service.port = tcp_server.socket.getsockname()[1]
3447
2159
logger.info("Now listening on address %r, port %d,"
3448
" flowinfo %d, scope_id %d",
3449
*tcp_server.socket.getsockname())
2160
" flowinfo %d, scope_id %d"
2161
% tcp_server.socket.getsockname())
3451
logger.info("Now listening on address %r, port %d",
3452
*tcp_server.socket.getsockname())
3454
# service.interface = tcp_server.socket.getsockname()[3]
2163
logger.info("Now listening on address %r, port %d"
2164
% tcp_server.socket.getsockname())
2166
#service.interface = tcp_server.socket.getsockname()[3]
3458
# From the Avahi example code
3461
except dbus.exceptions.DBusException as error:
3462
logger.critical("D-Bus Exception", exc_info=error)
3465
# End of Avahi example code
3467
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3468
lambda *args, **kwargs:
3469
(tcp_server.handle_request
3470
(*args[2:], **kwargs) or True))
2169
# From the Avahi example code
2172
except dbus.exceptions.DBusException as error:
2173
logger.critical("DBusException: %s", error)
2176
# End of Avahi example code
2178
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2179
lambda *args, **kwargs:
2180
(tcp_server.handle_request
2181
(*args[2:], **kwargs) or True))
3472
2183
logger.debug("Starting main loop")
3473
2184
main_loop.run()
3474
2185
except AvahiError as error:
3475
logger.critical("Avahi Error", exc_info=error)
2186
logger.critical("AvahiError: %s", error)
3478
2189
except KeyboardInterrupt: